Zerto - Virtual replication & recovery solution
GoodSync - GoodSync provides highly reliable file backup and synchronization for both individuals and businesses.
Druva inSync - Your device may be lost, but your data isn’t with Druva inSync™ Integrated backup, eDiscovery and compliance monitoring.
FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.
rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.